Here are the ten top selling titles on Steam for the week as reported by Valve:
1.Call of Duty: Ghosts
2.Football Manager 2014
3.State of Decay
4.Total War: ROME II
5.Assassin's Creed IV: Black Flag
6.Assetto Corsa
7.Grand Theft Auto IV: Complete Edition
8.XCOM: Enemy Within
9.Space Engineers
10.Nether